182 Mr. J. E. Gray’s Synopsis of 
***E The upper series of marginal tubercles with 2 series of spines 
at the base and | along the edge of the arms. 
11. .Astropecten erinaceus, Gray. Arms gradually tapering, twice 
as long as the width of the body ; upper marginal tubercles rather 
narrow, with a series of small short spines, and a series of 6 or 8 
larger ones. 
«« St. Elena, sandy mud, 6 fathoms.” H. Cuming, Esq. 
tt The under or oral series of marginal tubercles rounded and not 
produced beyond the dorsal ones. 
* The upper series with a series of short spines. 
12. Astropecten Mauritianus, Gray. Rays broad; lower spines 
broad, strap-shaped. 
Inhab. Isle of France. 
** Upper series spineless. 
13. Astropecten mesodiscus, Linck, 29. t. 4. f. 16. Rays elongate, 
slender, tapering ; upper marginal tubercles narrow, with 2 series of 
short small tubercles like granules, one on each of the margins; 
lower spines broad, elongate. 
Inhab. : 
14. Astropecten gracilis, Gray. Rays elongate, slender, gradually 
tapering; upper marginal plates rather broad, granular with fine 
spines on the suture between them; lower spines small, blunt, de- 
pressed. 
Inhab. 
15. Astropecten irregularis, Linck, 27. t.6. f.13. A. aurantiaca, 
Muller, Z. D. t. 83. A. Johnstoni, Chiaje? Rays rather broad, 
tapering; the upper tubercles rather broad, with a series of 1 or 2 
scattered tubercular spines near the tip; lower spines depressed, 
acute. 
Inhab. Pembrokeshire, Linck. 
16. Astropecten dubius. Rays broad, tapering; upper marginal 
tubercles rather broad, granular, spineless ? lower spines broad, de- 
pressed. 
Inhab. West Indies. 
*#* Upper and lower margin spineless, serrated ? 
17. Astropecten regularis, Linck, 26. t.8.f.11. Asterias petalo- 
dea, Retz, Aster. 16. n. 14? 
Inhab. I have never seen this species. 
3. Body 5-rayed, the arms high, narrow ; upper marginal tubercles 
very narrow and erect ; the line of dorsal tubercles down the centre of 
the arms the largest. Astropus, Gray. 
18. Astropecten longipes, Gray. Rays long and narrow; the up- 
per marginal tubercles minutely granular, and 1 or 2 of them often 
furnished with a short broad conical spine; lower with a broad de- 
pressed blunt erect adpressed spine ; monstrosity 4-rayed. 
Inhab. ‘‘Isle of France,” Leach. 
Like the former, but arms narrower. 
